Grinding-mill.



No. 827,703. PATENTED AUG. '7, 1906.

J. N. BOSCH, 3E. GRINDING MILL.

APPLICATION FILED IEB.1.8, 1905.

2 SHEBTBrSHEET 1.

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JOHN N. BOSCH, JR, OF OEMENTON, PENNSYLVANIA.

GRINDING-MILL.

Specification of Letters Patent.

Patented Aug. 7, 1906.

Application filed February 16,1905. Serial No. 245,940.

To all 1071,0711 it 777/661] concern:

Be it known that I, JOHN N. Boson, Jr., a citizen of the United States, residing at Oementon, in the county of Lehigh, State of Pennsylvania, have invented certain new and useful Improvements in Grinding-Mills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to mills, and more particularly to grinding-mills, and has for its object to provide a mill which will have a mortarandpestle action and which may be easily adjusted to crush grain and similar matter to different degrees of fineness.

Other objects and advantages will be apparent from the following description, and it will be understood that modifications of the specific construction shown may be made and any suitable materials may be used without departing from the spirit of the invention.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a side elevation of the present invention. Fig.2 is a longitudinal section of the mill. Fig. 3 is a top plan view. Fig. 4 is an enlarged detail section of the balland-socket joint and the adjustable neck of the pestle.

Referring now to the drawings, the present invention comprises a suitable base 5, which is shown in the drawings as being formed of masonry. The base has a pocket 6 in its up per surface, and secured therewithin there is a metallic lining 7, this lining being concaved, as shown, and at its upper edge the lining has a laterally-extending flange 8, which rests upon the upper surface of the base at the sides of the pocket. Disposed within the lining 7 there is a supplemental lining 7. Surrounding the pocket and arranged to discharge thereinto there is a funnel-shaped chute 9, the minor end of the chute resting at its edge against the flange 8 at the edge of the pocket. There is thus formed what may be termed the mortar of the mill. Formed through the bottom of the linings 7 and 7, at the center thereof, there is an opening 10, which communicates with a discharge-passage 11, extending downwardly through the base 5.

Secured to the base at opposite sides of the trically upon the wheel, at the under side thereof, there is a socket 17 of a ball-andsocket joint, the ball 18 thereof being carried by a depending threaded stem 19. The socket 17 consists of two members 20, having coopcrating concave recesses 21 therein and having flanges 22 extending at right angles to the members.

The wheel 16 carries a pair of spaced lugs C, which are provided with passages in which there are engaged a bolt D. The jaws 20 are provided with ears A, having passages A in which the bolt is engaged, the jaws being slidable upon the bolt, and at either side of the jaws the bolt has an adjusting-nut B, by means of which the jaws may be ad usted. with respect to each other and over the face I of the wheel. The bolt also has am-nuts E engaged therewith, by which the nuts B may be located at different points upon the bolt. The jaws being thus adjustable toward and away from each other, it is possible to vary the size of the socket to adjust the ball-andsocket joint. The bolt D may be removed from the lugs O when desired to permit of replacements to be made.

A pestle 23 is provided, which has a rounded lower end 24 of a size to fit within and rest against the lining 7 and at its upper end the estle has an upwardly-extending neck 25,

aving a threaded recess 26 in its outer end, and formed through the sides of theneck are threaded passages 27, which communicate with the recess 26 and which receive setscrews 28. The lower portion of the stem 19 is threaded, and this threaded portion is engaged in the threaded recess 26, and it will. be understood that the set-screws 28 may be operated to prevent movement of the stem 19 within the recess. Above its threaded portion the stem 19 is provided with an angular shoulder 19 for a purpose to be presently described, and a jam-nut F is engaged with the stem above the pestle. The shaft 15 is provided with a belt-wheel 15 for the reception of a belt to operate the mechanism, and it will be apparent that when the shaft 15 is revolved the wheel 16 will be revolved, and the pestle 23 will be given a rotary and rocking motion within the pocket 6. Formed in the lower rounded end of the pestle 23 there is a circumscribing groove 29, and this groove is so disposed that as the pestle is rotated and revolved the successive portions of the groove are exposed above the pocket 6. The matter to be ground is disposed in the chute 9 and passes downwardly and between the postle and the lining of the pocket, where it is crushed, as will be readily understood. The matter to be crushed also enters the groove 29 of the exposed portion thereof and is carried downwardly into the pocket, as will be readily understood, the matter passing out of the groove to the slight space which is left between the pestle and the lining of the pocket, where it is crushed. Any pieces of matter which are too large to pass entirely into the groove 29 have their edge portions caught by this groove and broken away until the pieces of matter are small enough to enter the groove or the space between the pestle and the lining of the pocket. The crushed matter passes outwardly through the discharge-chute 11 to a suitable receptacle disposed beneath the outer end thereof.

To vary the distance between the pestle and the lining of the pocket, the pestle may be raised or lowered by screwing the stem 19 into or out of the recess 26, and this stem may be grasped with a wrench at its angular shoulder 19 in order that it may be operated as just described. It will be understood that this adjustment of the pestle ;will vary the fineness to which the matter'isgiound.

What is claimed is 1. A mechanism of theclass described comprising a mortar, a pestle in the mortar, a wheel mounted above the mortar for rotation in a horizontal plane, spaced lugs carried by the wheel on its under side, a threaded rod engaged in the lugs, jaws slidably connected with the rod, said jaws being arranged for cooperation to form a socket, means for varying the distance between the jaws, a stem having a ball engaged in the jaws, and a estle adjustably connected with the stem and engaged in the mortar.

2. A mechanism of the class described comprising a mortar, a pestle disposed within the mortar, said pestle having a threaded recess in its upper end, a revolubly-mounted wheel, a stern rotatably and pivotally connected with the wheel eccentrically thereof, said stem being threaded and having its threaded portion engaged in the recess of the pestle, said stem being adapted to be screwed into and out of the recess to vary the distance between the grinding-surfaces of the pestle and mortar.

In testimony whereof I afiiX my signature in presence of two witnesses.

JOHN N. BOSCH, JR.

Witnesses:

GEO. FEUSTERMACHER, CHAS. A. HARTMAN. 

